Gold Price Conversion Calculator

Gold Price Conversion Calculator – Convert Prices Accurately :root { –primary-color: #004a99; –success-color: #28a745; –background-color: #f8f9fa; –text-color: #333; –border-color: #ddd; –card-background: #fff; –shadow: 0 2px 5px rgba(0,0,0,0.1); } body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: var(–background-color); color: var(–text-color); line-height: 1.6; margin: 0; padding: 0; display: flex; flex-direction: column; align-items: center; } .container { width: 100%; max-width: 960px; margin: 20px auto; padding: 20px; background-color: var(–card-background); border-radius: 8px; box-shadow: var(–shadow); box-sizing: border-box; } header { width: 100%; background-color: var(–primary-color); color: white; padding: 20px 0; text-align: center; margin-bottom: 20px; box-shadow: var(–shadow); } header h1 { margin: 0; font-size: 2.5em; } h1, h2, h3 { color: var(–primary-color); } h2 { text-align: center; margin-top: 30px; margin-bottom: 15px; font-size: 2em; } h3 { margin-top: 25px; margin-bottom: 10px; font-size: 1.5em; } .calculator-section { background-color: var(–card-background); padding: 30px; border-radius: 8px; box-shadow: var(–shadow); margin-bottom: 30px; } .loan-calc-container { display: flex; flex-direction: column; gap: 15px; } .input-group { margin-bottom: 15px; display: flex; flex-direction: column; } .input-group label { font-weight: bold; margin-bottom: 5px; display: block; } .input-group input[type="number"], .input-group select { padding: 10px; border: 1px solid var(–border-color); border-radius: 4px; font-size: 1em; width: 100%; box-sizing: border-box; } .input-group input[type="number"]:focus, .input-group select:focus { outline: none; border-color: var(–primary-color); box-shadow: 0 0 0 2px rgba(0, 74, 153, 0.2); } .input-group .helper-text { font-size: 0.85em; color: #666; margin-top: 5px; } .error-message { color: red; font-size: 0.8em; margin-top: 5px; min-height: 1.2em; } .results-container { margin-top: 20px; padding: 20px; background-color: #e9ecef; border-radius: 5px; border: 1px solid #ced4da; } .results-container h3 { margin-top: 0; color: var(–primary-color); } .main-result { font-size: 2em; font-weight: bold; color: var(–primary-color); background-color: #d1ecf1; padding: 15px; border-radius: 5px; margin-bottom: 15px; text-align: center; border: 1px solid #bee5eb; } .intermediate-results div { margin-bottom: 10px; font-size: 1.1em; } .intermediate-results strong { color: var(–primary-color); min-width: 200px; display: inline-block; } .formula-explanation { font-size: 0.9em; color: #555; margin-top: 15px; padding-top: 10px; border-top: 1px dashed #ccc; } .button-group { display: flex; gap: 10px; margin-top: 20px; justify-content: center; flex-wrap: wrap; } .button-group button { padding: 10px 15px; border: none; border-radius: 4px; cursor: pointer; font-size: 1em; font-weight: bold; transition: background-color 0.3s ease; } .btn-calculate { background-color: var(–primary-color); color: white; } .btn-calculate:hover { background-color: #003366; } .btn-reset { background-color: #ffc107; color: #212529; } .btn-reset:hover { background-color: #e0a800; } .btn-copy { background-color: var(–success-color); color: white; } .btn-copy:hover { background-color: #218838; } .chart-container { margin-top: 30px; padding: 20px; background-color: var(–card-background); border-radius: 8px; box-shadow: var(–shadow); text-align: center; } canvas { max-width: 100%; height: auto; } caption { font-size: 0.9em; color: #555; margin-bottom: 10px; caption-side: bottom; text-align: center; } table { width: 100%; border-collapse: collapse; margin-top: 15px; } th, td { padding: 8px 12px; border: 1px solid var(–border-color); text-align: right; } th { background-color: #e9ecef; font-weight: bold; text-align: center; } td:first-child, th:first-child { text-align: left; } .article-content { margin-top: 30px; padding: 30px; background-color: var(–card-background); border-radius: 8px; box-shadow: var(–shadow); text-align: left; } .article-content p, .article-content ul, .article-content ol { margin-bottom: 15px; } .article-content h2, .article-content h3 { text-align: left; margin-top: 30px; margin-bottom: 15px; } .article-content ul { list-style-type: disc; padding-left: 20px; } .article-content li { margin-bottom: 8px; } .article-content strong { color: var(–primary-color); } .faq-item { margin-bottom: 15px; } .faq-item .question { font-weight: bold; color: var(–primary-color); cursor: pointer; margin-bottom: 5px; display: block; } .faq-item .answer { display: none; padding-left: 15px; border-left: 2px solid var(–primary-color); font-size: 0.95em; } .faq-item .answer.visible { display: block; } .related-links ul { list-style: none; padding: 0; } .related-links li { margin-bottom: 10px; } .related-links a { color: var(–primary-color); text-decoration: none; font-weight: bold; } .related-links a:hover { text-decoration: underline; } .related-links span { font-size: 0.9em; color: #555; display: block; margin-top: 3px; } /* Specific styles for calculator */ .unit-selector { display: flex; gap: 10px; margin-bottom: 15px; flex-wrap: wrap; } .unit-selector button { padding: 8px 12px; border: 1px solid var(–border-color); border-radius: 4px; cursor: pointer; background-color: #f8f9fa; font-size: 0.95em; transition: background-color 0.2s ease, border-color 0.2s ease; } .unit-selector button.active { background-color: var(–primary-color); color: white; border-color: var(–primary-color); } .unit-selector button:hover:not(.active) { background-color: #e9ecef; } .currency-group { display: flex; gap: 10px; align-items: center; margin-bottom: 15px; flex-wrap: wrap; } .currency-group label { font-weight: bold; } .currency-group select { flex-grow: 1; min-width: 120px; } .value-display { font-size: 1.1em; color: #555; } .value-display strong { color: var(–primary-color); } .chart-controls { display: flex; flex-direction: column; gap: 10px; align-items: center; margin-bottom: 15px; } .chart-controls label { font-weight: bold; } .chart-controls select { max-width: 200px; padding: 8px; } @media (min-width: 600px) { .container { padding: 30px; } .loan-calc-container { gap: 20px; } .input-group input[type="number"], .input-group select { max-width: 400px; } .button-group { justify-content: flex-start; } .results-container { margin-left: auto; margin-right: auto; max-width: 600px; } } @media (min-width: 768px) { header h1 { font-size: 3em; } h2 { font-size: 2.2em; } }

Gold Price Conversion Calculator

Gold Price Conversion Calculator

Easily convert gold prices between different units of weight and currencies using this accurate gold price conversion calculator.

Enter the quantity of gold.
Select the current unit of your gold amount.
United States Dollar (USD) Euro (EUR) British Pound (GBP) Japanese Yen (JPY) Indian Rupee (INR) Australian Dollar (AUD) Canadian Dollar (CAD) Swiss Franc (CHF) Chinese Yuan (CNY) Hong Kong Dollar (HKD) Singapore Dollar (SGD)
Choose the currency the gold price is currently in.
Enter the price of one unit (e.g., per gram, per ounce) in the selected currency.
United States Dollar (USD) Euro (EUR) British Pound (GBP) Japanese Yen (JPY) Indian Rupee (INR) Australian Dollar (AUD) Canadian Dollar (CAD) Swiss Franc (CHF) Chinese Yuan (CNY) Hong Kong Dollar (HKD) Singapore Dollar (SGD)
Select the currency you want to convert to.
Grams Kilograms Troy Ounces Troy Pounds

Conversion Results

Formula:
1. Total Value (Current Currency) = Amount of Gold * Price per Unit
2. Total Value (Target Currency) = Total Value (Current Currency) * Exchange Rate
3. Price per Unit (Target Currency) = Total Value (Target Currency) / Amount of Gold (in target unit)

Price Trend by Unit

Example: Price per Troy Ounce in USD across different weights.

Unit Conversion Factors

Unit Grams Kilograms Troy Ounces Troy Pounds
Gram (g) 1 0.001 0.0321507 0.000771618
Kilogram (kg) 1000 1 32.1507 7.71618
Troy Ounce (oz) 31.1035 0.0311035 1 0.0833333
Troy Pound (lb) 386.093 0.386093 12.3333 1
Conversions are approximate and based on standard definitions.

{primary_keyword}

A gold price conversion calculator is a specialized financial tool designed to help users accurately determine the value of gold across different units of weight and various currencies. Gold, a universally recognized precious metal, is traded globally, and its price is influenced by numerous factors. However, reporting and trading often occur in different weights (like grams, ounces, kilograms) and denominations (like USD, EUR, JPY). This calculator bridges that gap, providing instant, precise conversions. It's an indispensable asset for anyone involved in buying, selling, investing in, or even crafting with gold. Understanding the real-time value of your gold holdings, regardless of the unit or currency it's expressed in, is crucial for informed financial decisions. This gold price conversion calculator demystifies these complex exchanges.

Who Should Use a Gold Price Conversion Calculator?

  • Investors: Individuals and institutions tracking gold's performance as an asset class need to understand its value irrespective of reporting conventions.
  • Jewelers & Goldsmiths: Professionals who buy gold in bulk and sell finished products need to price items accurately based on fluctuating spot prices and varying unit costs.
  • Dealers & Traders: Those actively buying and selling gold bullion, coins, or scrap require real-time price data in their preferred currency and units.
  • Collectors: Individuals acquiring gold coins, bars, or antique jewelry need to assess fair market value.
  • Financial Analysts: Experts monitoring commodity markets use such tools to compare gold prices against other assets and currencies.
  • Enthusiasts: Anyone curious about the value of gold, whether personal heirlooms or market prices, can benefit.

Common Misconceptions about Gold Prices

Several misunderstandings surround gold pricing. Firstly, people often confuse troy ounces (used for precious metals) with avoirdupois ounces (used for general goods); they are not the same. Secondly, the "spot price" of gold is a benchmark, but retail prices for physical gold often include premiums for refining, minting, and dealer markup, making them higher than the spot price. Lastly, while gold is a global commodity, currency exchange rates and local market demand can create price variations between countries, even when the base price is theoretically the same. This gold price conversion calculator helps clarify these points by allowing direct unit and currency comparisons.

{primary_keyword} Formula and Mathematical Explanation

The core of the gold price conversion calculator relies on a two-step conversion process: first, converting the quantity to a standard unit (or calculating total value in the current unit), and second, converting the value from the current currency to the target currency using an exchange rate. For consistency and easier calculation, our calculator internally works with grams and a base currency (like USD) for intermediate calculations before converting to the target currency.

Step-by-Step Derivation

  1. Quantity Standardization: Convert the input 'Amount of Gold' from its 'Unit of Weight' into grams.
    Quantity (grams) = Amount of Gold * Conversion Factor (from input unit to grams)
  2. Value in Current Currency: Calculate the total value of the gold in the 'Current Currency'.
    Total Value (Current Currency) = Quantity (grams) * Price per Gram (Current Currency)
    Where 'Price per Gram (Current Currency)' is derived from the input 'Price per Unit' and the 'Unit of Weight'.
    Price per Gram (Current Currency) = Current Price / Conversion Factor (from input unit to grams)
  3. Exchange Rate Application: Obtain the current exchange rate between the 'Current Currency' and the 'Target Currency'. (Note: For simplicity in this calculator, we assume direct exchange rates are available or approximated. Real-world rates fluctuate.)
    Exchange Rate = 1 Current Currency = X Target Currency
  4. Value in Target Currency: Convert the total value to the 'Target Currency'.
    Total Value (Target Currency) = Total Value (Current Currency) * Exchange Rate
  5. Price per Standard Unit in Target Currency: Calculate the price per gram in the target currency.
    Price per Gram (Target Currency) = Total Value (Target Currency) / Quantity (grams)
  6. Price per Other Units in Target Currency: Convert the price per gram to the price per other standard units (like Troy Ounce, Kilogram, Troy Pound) in the 'Target Currency'.
    Price per Troy Ounce (Target Currency) = Price per Gram (Target Currency) * 31.1035
    Price per Kilogram (Target Currency) = Price per Gram (Target Currency) * 1000
    Price per Troy Pound (Target Currency) = Price per Gram (Target Currency) * 386.093

Variable Explanations

Variable Meaning Unit Typical Range
Amount of Gold The quantity of gold being evaluated. Grams, Kilograms, Troy Ounces, Troy Pounds 0.1 – 1000+
Unit of Weight The unit in which the 'Amount of Gold' is measured. Enum (Gram, Kilogram, Troy Ounce, Troy Pound) N/A
Current Currency The currency in which the gold price is initially provided. Currency Code (USD, EUR, JPY, etc.) N/A
Current Price The price of one unit of gold in the 'Current Currency'. Currency Unit (e.g., USD per Gram) 1 – 100000+
Target Currency The currency to which the gold price needs to be converted. Currency Code (USD, EUR, JPY, etc.) N/A
Exchange Rate The conversion factor between the 'Current Currency' and 'Target Currency'. (Approximated for this tool) Ratio (e.g., 0.92 for EUR to USD) 0.5 – 2.0+
Price per Gram (Target Currency) The calculated price of one gram of gold in the target currency. Currency Unit (e.g., USD per Gram) 1 – 100+
Total Value (Target Currency) The total market value of the specified 'Amount of Gold' in the 'Target Currency'. Currency Unit (e.g., USD) 10 – 1000000+

Practical Examples (Real-World Use Cases)

Example 1: Jeweler Pricing a Custom Piece

A jeweler has sourced 50 grams of gold. The current market price for gold is 70 EUR per gram. They need to price a custom necklace in US Dollars for an international client.

  • Inputs:
    • Amount of Gold: 50
    • Unit of Weight: Gram (g)
    • Current Currency: EUR
    • Current Price: 70
    • Target Currency: USD
  • Assumptions:
    • Exchange Rate (EUR to USD): Approximately 1.08
  • Calculation Steps (Simplified):
    • Total Value in EUR = 50 g * 70 EUR/g = 3500 EUR
    • Total Value in USD = 3500 EUR * 1.08 USD/EUR = 3780 USD
    • Price per Gram in USD = 3780 USD / 50 g = 75.60 USD/g
    • Price per Troy Ounce in USD = 75.60 USD/g * 31.1035 g/oz ≈ 2351.16 USD/oz
  • Interpretation: The jeweler can accurately determine that their 50 grams of gold are worth approximately $3,780 USD, and they can quote prices based on the converted rate of $75.60 per gram or $2,351.16 per troy ounce. This gold price conversion calculator simplifies this conversion, ensuring competitive and accurate pricing.

Example 2: Investor Checking Value of Holdings

An investor holds 20 Troy Ounces of gold, currently priced at $2,300 USD per Troy Ounce. They want to know the value in Japanese Yen (JPY).

  • Inputs:
    • Amount of Gold: 20
    • Unit of Weight: Troy Ounce (oz)
    • Current Currency: USD
    • Current Price: 2300
    • Target Currency: JPY
  • Assumptions:
    • Exchange Rate (USD to JPY): Approximately 155 JPY/USD
  • Calculation Steps (Simplified):
    • Total Value in USD = 20 oz * 2300 USD/oz = 46000 USD
    • Total Value in JPY = 46000 USD * 155 JPY/USD = 7,130,000 JPY
    • Price per Troy Ounce in JPY = 7,130,000 JPY / 20 oz = 356,500 JPY/oz
    • Price per Gram in JPY = 356,500 JPY/oz / 31.1035 g/oz ≈ 11,461.7 JPY/g
  • Interpretation: The investor's 20 Troy Ounces of gold are valued at approximately ¥7,130,000 JPY. This helps them track their portfolio's performance in a different currency, a common need for globally diversified investors. Using this gold price conversion calculator provides a quick and reliable valuation.

How to Use This Gold Price Conversion Calculator

Using the gold price conversion calculator is straightforward. Follow these simple steps:

  1. Enter Gold Amount: Input the quantity of gold you have or are interested in (e.g., 10, 50, 100).
  2. Select Weight Unit: Choose the unit in which your gold amount is measured (e.g., Grams, Troy Ounces, Kilograms, Troy Pounds). Click the corresponding button.
  3. Specify Current Currency: Select the currency in which the current gold price is quoted from the first dropdown menu.
  4. Enter Current Price: Input the price for one unit of gold in your selected 'Current Currency'. For example, if you selected 'Troy Ounce' and 'USD', and gold is $2300/oz, enter 2300.
  5. Choose Target Currency: Select the currency you wish to convert the gold price into from the second dropdown menu.
  6. Click 'Calculate': Press the 'Calculate' button.

Reading the Results

  • Main Result: Displays the total value of your specified gold amount in the 'Target Currency'.
  • Intermediate Values: You'll see the total value in the 'Current Currency', and the calculated price per gram and per Troy Ounce in the 'Target Currency'. These provide more granular insights.
  • Formula Explanation: A brief description of the calculation logic is provided.

Decision-Making Guidance

The results can help you make informed decisions:

  • Buying/Selling: Compare the converted price against local market offers to ensure you're getting a fair deal.
  • Investment Strategy: Understand how the value of your gold holdings translates into different currencies, which is vital for international diversification.
  • Pricing Goods: If you're a jeweler or artisan, use the per-gram or per-ounce price in your target currency to accurately price your gold-based products.

Don't forget to use the 'Reset' button to clear fields and start a new calculation, or the 'Copy Results' button to save or share your findings.

Key Factors That Affect Gold Price Conversion Results

While the gold price conversion calculator provides precise mathematical conversions, several real-world factors can influence the actual prices you encounter:

  1. Spot Price Fluctuations: The global spot price of gold changes constantly based on supply and demand, geopolitical events, economic indicators, and market sentiment. The calculator uses a static input price, but the real market price may differ by the time you transact.
  2. Currency Exchange Rates: The calculator uses a representative exchange rate. However, actual rates vary based on market trading, economic policies, and international finance. The rate used can significantly impact the final converted value. Always check live rates for critical transactions.
  3. Premiums and Markups: Physical gold, especially in minted forms like coins or bars, often carries a premium above the spot price. This covers manufacturing, distribution, and dealer profit. The calculator works with the price you input, which may or may not include these premiums.
  4. Purity (Fineness): Gold is often measured in karats (e.g., 24K for pure gold, 18K for 75% gold). The calculator assumes you are inputting the price for pure (24K) gold or that the price provided already accounts for the specific purity. If dealing with alloys, adjustments are necessary.
  5. Transaction Fees and Costs: Buying or selling gold can involve various fees, such as brokerage commissions, assay fees, shipping costs, or bank transfer charges. These are not factored into the calculator but affect the net amount received or paid.
  6. Inflation and Economic Stability: Gold is often seen as a hedge against inflation and economic uncertainty. During periods of high inflation or instability, demand for gold may increase, potentially driving up its price even in local currency terms, which would then affect conversion results.
  7. Taxes: Capital gains taxes or sales taxes may apply to gold transactions depending on your jurisdiction and the nature of the transaction. These are not included in the calculator's output but are a crucial consideration for the overall financial outcome.

Frequently Asked Questions (FAQ)

What is the difference between a Troy Ounce and a regular Ounce?
A Troy Ounce is specifically used for precious metals like gold, silver, and platinum. It weighs approximately 31.1035 grams. A standard (avoirdupois) ounce, used for everyday items, weighs about 28.35 grams. This difference is significant when calculating gold's value.
Does the calculator account for the purity of gold (e.g., 18K vs 24K)?
This calculator assumes the 'Current Price' entered is for pure gold (24K) or reflects the price for the specific purity you are working with. If you are using a price for 18K gold, for instance, remember that it is only 75% pure gold. You would either need to adjust the input price or the final result accordingly.
Are the exchange rates live?
The exchange rates used by this calculator are illustrative approximations for demonstration purposes. For real-time, exact trading, you should consult a live currency exchange service. Exchange rates fluctuate constantly.
What does "Price per Unit in Current Currency" mean?
It's the price of ONE unit of gold (based on the 'Unit of Weight' you selected, like one gram or one troy ounce) in the 'Current Currency' you specified. For example, if you select 'Troy Ounce' and enter $2300, it means gold costs $2300 for each Troy Ounce in that currency.
Can I convert between different weights directly (e.g., grams to kilograms)?
Yes, indirectly. You can input your amount in grams, convert it to a target currency, and then use the 'Price per Gram in Target Currency' result to calculate the price for kilograms or ounces in that same target currency. The calculator primarily focuses on currency conversion but provides necessary per-unit prices.
What are premiums in the gold market?
Premiums are the amount added to the spot price of gold when buying physical gold products like coins or bars. This covers the costs of minting, refining, distribution, and the dealer's profit margin. The calculator does not automatically include premiums; they must be factored into the 'Current Price' input if relevant.
How does geopolitical risk affect gold prices?
During times of geopolitical uncertainty or crisis, investors often turn to gold as a safe-haven asset. Increased demand can drive up the price of gold, which will be reflected in the calculator's results when you input the new, higher price.
Is this calculator suitable for valuing scrap gold?
Yes, provided you know the approximate weight and purity of the scrap gold. You would typically input the weight, select the appropriate unit, and then enter the price per unit based on its karat value (e.g., if 18K gold is worth 75% of 24K gold's price). You'd need to adjust the input price to reflect the purity.
var currentUnitButtons = document.getElementById('weightUnitSelector').getElementsByTagName('button'); var chartUnitSelect = document.getElementById('chartUnit'); var conversionFactors = { gram: { toGram: 1, toKilogram: 0.001, toOunce: 0.0321507, toPound: 0.000771618 }, kilogram: { toGram: 1000, toKilogram: 1, toOunce: 32.1507, toPound: 7.71618 }, ounce: { toGram: 31.1035, toKilogram: 0.0311035, toOunce: 1, toPound: 0.0833333 }, pound: { toGram: 386.093, toKilogram: 0.386093, toOunce: 12.3333, toPound: 1 } }; // Placeholder for exchange rates – in a real application, fetch these from an API var exchangeRates = { USD: { EUR: 0.92, GBP: 0.79, JPY: 155, INR: 83, AUD: 1.51, CAD: 1.36, CHF: 0.89, CNY: 7.23, HKD: 7.82, SGD: 1.35 }, EUR: { USD: 1.08, GBP: 0.86, JPY: 168, INR: 90, AUD: 1.64, CAD: 1.48, CHF: 0.97, CNY: 7.85, HKD: 8.49, SGD: 1.46 }, GBP: { USD: 1.27, EUR: 1.16, JPY: 195, INR: 105, AUD: 1.90, CAD: 1.72, CHF: 1.13, CNY: 9.13, HKD: 9.87, SGD: 1.70 }, JPY: { USD: 0.0064, EUR: 0.0059, GBP: 0.0051, INR: 0.54, AUD: 0.0097, CAD: 0.0088, CHF: 0.0058, CNY: 0.046, HKD: 0.051, SGD: 0.0087 }, INR: { USD: 0.012, EUR: 0.011, GBP: 0.0095, JPY: 1.85, AUD: 0.018, CAD: 0.016, CHF: 0.011, CNY: 0.087, HKD: 0.094, SGD: 0.016 }, AUD: { USD: 0.66, EUR: 0.61, GBP: 0.53, JPY: 103, INR: 56, CAD: 0.90, CHF: 0.59, CNY: 4.78, HKD: 5.18, SGD: 0.89 }, CAD: { USD: 0.73, EUR: 0.68, GBP: 0.58, JPY: 114, INR: 62, AUD: 1.11, CHF: 0.65, CNY: 5.31, HKD: 5.75, SGD: 0.99 }, CHF: { USD: 1.12, EUR: 1.03, GBP: 0.88, JPY: 175, INR: 95, AUD: 1.69, CAD: 1.53, CNY: 8.10, HKD: 8.77, SGD: 1.51 }, CNY: { USD: 0.14, EUR: 0.13, GBP: 0.11, JPY: 21.6, INR: 11.7, AUD: 0.21, CAD: 0.19, CHF: 0.12, HKD: 1.08, SGD: 0.19 }, HKD: { USD: 0.13, EUR: 0.12, GBP: 0.10, JPY: 19.9, INR: 10.8, AUD: 0.19, CAD: 0.17, CHF: 0.11, CNY: 0.93, SGD: 0.17 }, SGD: { USD: 0.74, EUR: 0.68, GBP: 0.59, JPY: 113, INR: 61, AUD: 1.12, CAD: 1.01, CHF: 0.66, CNY: 6.03, HKD: 5.45 } }; function getExchangeRate(fromCurrency, toCurrency) { if (fromCurrency === toCurrency) return 1; if (exchangeRates[fromCurrency] && exchangeRates[fromCurrency][toCurrency]) { return exchangeRates[fromCurrency][toCurrency]; } // Fallback for inverse rate if not directly available if (exchangeRates[toCurrency] && exchangeRates[toCurrency][fromCurrency]) { return 1 / exchangeRates[toCurrency][fromCurrency]; } return 1; // Default to 1 if rate not found } function updateActiveUnitButton(selectedUnit) { for (var i = 0; i < currentUnitButtons.length; i++) { if (currentUnitButtons[i].getAttribute('data-unit') === selectedUnit) { currentUnitButtons[i].classList.add('active'); } else { currentUnitButtons[i].classList.remove('active'); } } } function getSelectedWeightUnit() { for (var i = 0; i < currentUnitButtons.length; i++) { if (currentUnitButtons[i].classList.contains('active')) { return currentUnitButtons[i].getAttribute('data-unit'); } } return 'gram'; // Default if somehow none is active } function validateInput(id, errorId, minValue = 0, maxValue = Infinity) { var input = document.getElementById(id); var errorDisplay = document.getElementById(errorId); var value = parseFloat(input.value); errorDisplay.textContent = ''; // Clear previous error if (isNaN(value)) { errorDisplay.textContent = 'Please enter a valid number.'; return false; } if (value maxValue) { errorDisplay.textContent = 'Value is too high.'; return false; } return true; } function calculateGoldPrice() { // Clear all errors first document.getElementById('goldAmountError').textContent = "; document.getElementById('currentPriceError').textContent = "; // Validate inputs var isGoldAmountValid = validateInput('goldAmount', 'goldAmountError'); var isCurrentPriceValid = validateInput('currentPrice', 'currentPriceError'); if (!isGoldAmountValid || !isCurrentPriceValid) { return; // Stop calculation if validation fails } var goldAmount = parseFloat(document.getElementById('goldAmount').value); var currentPrice = parseFloat(document.getElementById('currentPrice').value); var currentCurrency = document.getElementById('currentCurrency').value; var targetCurrency = document.getElementById('targetCurrency').value; var selectedUnit = getSelectedWeightUnit(); var chartUnit = chartUnitSelect.value; var pricePerUnitInCurrent = currentPrice; // Price per the selected unit var amountInSelectedUnit = goldAmount; // — Calculations — // 1. Convert amount to grams for internal calculation var amountInGrams = amountInSelectedUnit * conversionFactors[selectedUnit].toGram; // 2. Calculate price per gram in current currency var pricePerGramCurrent = pricePerUnitInCurrent / conversionFactors[selectedUnit].toGram; // 3. Calculate total value in current currency var totalValueCurrent = amountInGrams * pricePerGramCurrent; // 4. Get exchange rate and calculate total value in target currency var exchangeRate = getExchangeRate(currentCurrency, targetCurrency); var totalValueTarget = totalValueCurrent * exchangeRate; // 5. Calculate price per gram in target currency var pricePerGramTarget = totalValueTarget / amountInGrams; // 6. Calculate price per other standard units in target currency var pricePerOunceTarget = pricePerGramTarget * conversionFactors.ounce.toGram; var pricePerKilogramTarget = pricePerGramTarget * conversionFactors.kilogram.toGram; var pricePerPoundTarget = pricePerGramTarget * conversionFactors.pound.toGram; // — Display Results — var mainResultDisplay = document.getElementById('mainResult'); var totalValueInCurrentDisplay = document.getElementById('totalValueInCurrent'); var totalValueInTargetDisplay = document.getElementById('totalValueInTarget'); var pricePerGramDisplay = document.getElementById('pricePerGramInTarget'); var pricePerOunceDisplay = document.getElementById('pricePerOunceInTarget'); mainResultDisplay.textContent = totalValueTarget.toLocaleString(undefined, { style: 'currency', currency: targetCurrency }); totalValueInCurrentDisplay.innerHTML = 'Total Value (' + currentCurrency + '): ' + totalValueCurrent.toLocaleString(undefined, { style: 'currency', currency: currentCurrency }); totalValueInTargetDisplay.innerHTML = 'Total Value (' + targetCurrency + '): ' + totalValueTarget.toLocaleString(undefined, { style: 'currency', currency: targetCurrency }); pricePerGramDisplay.innerHTML = 'Price per Gram (' + targetCurrency + '): ' + pricePerGramTarget.toLocaleString(undefined, { style: 'currency', currency: targetCurrency, minimumFractionDigits: 4, maximumFractionDigits: 4 }); pricePerOunceDisplay.innerHTML = 'Price per Troy Ounce (' + targetCurrency + '): ' + pricePerOunceTarget.toLocaleString(undefined, { style: 'currency', currency: targetCurrency, minimumFractionDigits: 2, maximumFractionDigits: 2 }); // Update Chart updateChart(chartUnit, targetCurrency, pricePerGramTarget); } function resetCalculator() { document.getElementById('goldAmount').value = 100; document.getElementById('currentPrice').value = 60; // Assuming price per gram in USD document.getElementById('currentCurrency').value = 'USD'; document.getElementById('targetCurrency').value = 'EUR'; updateActiveUnitButton('gram'); // Reset to grams chartUnitSelect.value = 'gram'; // Reset chart unit // Clear errors document.getElementById('goldAmountError').textContent = "; document.getElementById('currentPriceError').textContent = "; // Update results display to default state document.getElementById('mainResult').textContent = '–'; document.getElementById('totalValueInCurrent').innerHTML = "; document.getElementById('totalValueInTarget').innerHTML = "; document.getElementById('pricePerGramInTarget').innerHTML = "; document.getElementById('pricePerOunceInTarget').innerHTML = "; // Clear chart if (window.priceChartInstance) { window.priceChartInstance.destroy(); window.priceChartInstance = null; } var canvas = document.getElementById('priceChart'); var ctx = canvas.getContext('2d'); ctx.clearRect(0, 0, canvas.width, canvas.height); } function copyResults() { var mainResult = document.getElementById('mainResult').textContent; var intermediateResults = document.getElementById('totalValueInCurrent').innerText + "\n" + document.getElementById('totalValueInTarget').innerText + "\n" + document.getElementById('pricePerGramInTarget').innerText + "\n" + document.getElementById('pricePerOunceInTarget').innerText; var assumptions = "Assumptions:\n" + "Amount: " + document.getElementById('goldAmount').value + " " + getSelectedWeightUnit() + "\n" + "Current Price: " + document.getElementById('currentPrice').value + " per " + getSelectedWeightUnit() + " in " + document.getElementById('currentCurrency').value + "\n" + "Target Currency: " + document.getElementById('targetCurrency').value + "\n" + "Exchange Rate (approx): " + getExchangeRate(document.getElementById('currentCurrency').value, document.getElementById('targetCurrency').value) + " " + document.getElementById('targetCurrency').value + " per " + document.getElementById('currentCurrency').value; var textToCopy = "Gold Price Conversion Results:\n\n" + "Main Value: " + mainResult + "\n\n" + intermediateResults + "\n\n" + assumptions; navigator.clipboard.writeText(textToCopy).then(function() { alert('Results copied to clipboard!'); }).catch(function(err) { console.error('Failed to copy results: ', err); alert('Failed to copy results. Please copy manually.'); }); } // Charting Logic using Canvas API var priceChart; var priceChartInstance = null; function updateChart(unit, currency, pricePerGramInTarget) { var canvas = document.getElementById('priceChart'); var ctx = canvas.getContext('2d'); // Clear previous chart if it exists if (priceChartInstance) { priceChartInstance.destroy(); } // Define data points for different amounts based on the selected unit and target currency price var chartDataPoints = []; var labels = []; var maxChartValue = 0; // Calculate prices for different quantities based on the selected unit var quantities = [0.5, 1, 5, 10, 20, 50, 100]; // Example quantities var conversionUnitFactor = conversionFactors[unit].toGram; // How many grams are in the selected unit for (var i = 0; i maxChartValue) { maxChartValue = valueInTargetCurrency; } } // Chart configuration priceChartInstance = new Chart(ctx, { type: 'bar', // Use bar chart for better visibility of discrete amounts data: { labels: labels, datasets: [{ label: 'Value in ' + currency, data: chartDataPoints, backgroundColor: 'rgba(0, 74, 153, 0.6)', // Primary color for bars borderColor: 'rgba(0, 74, 153, 1)', borderWidth: 1 }] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, title: { display: true, text: 'Value (' + currency + ')' }, ticks: { // Format y-axis labels as currency callback: function(value, index, values) { return value.toLocaleString(undefined, { style: 'currency', currency: currency, maximumFractionDigits: 0 }); } } }, x: { title: { display: true, text: 'Quantity of Gold (' + unit + ')' } } }, plugins: { tooltip: { callbacks: { label: function(context) { var label = context.dataset.label || "; if (label) { label += ': '; } if (context.parsed.y !== null) { label += context.parsed.y.toLocaleString(undefined, { style: 'currency', currency: currency }); } return label; } } }, legend: { display: true, position: 'top' } } } }); } // Event listeners for unit selection for (var i = 0; i < currentUnitButtons.length; i++) { currentUnitButtons[i].addEventListener('click', function() { var selectedUnit = this.getAttribute('data-unit'); updateActiveUnitButton(selectedUnit); // Optionally trigger calculation or update chart if needed immediately calculateGoldPrice(); // Recalculate when unit changes }); } // Event listener for chart unit change chartUnitSelect.addEventListener('change', function() { calculateGoldPrice(); // Recalculate to update chart with new unit context }); // Initial calculation and chart render on page load document.addEventListener('DOMContentLoaded', function() { resetCalculator(); // Set default values and clear results calculateGoldPrice(); // Perform initial calculation }); function toggleFaq(element) { var answer = element.nextElementSibling; answer.classList.toggle('visible'); }

Leave a Comment